Shachar Sharon
47839e46dc
Use K8s LivenessProbe mechanism to check OK-status of nfs-ganesha
container. A user may define his own lineness-probe, or a default one
which expects NFS TCP-port 2049 to be active; that is, willing to accept
new connections: for Ceph>=18.2.1 issue 'rpcinfo' call on local pod;
otherwise use standard K8s TCP-socket liveness probe mechanism.
Define permissive values to liveness-probe to ensure that the NFS
service is defined in failed-state only when it has non-recoverable
error.
The current default definition of LivenessProbe is expected to guard the
nfs pod from at least the following two cases:
- Deadlocks: where an nfs-ganesha server is running, but unable serve
new connections due to internal bad-state.
- Resource exhaustion on the host node (e.g. OOM) which prevents the
server from accepting new connections and reply to NULL RPC request.
In both cases we expect K8s to reschedule the nfs pod, most likely on
different host node.
Refs rook issue #12719
Signed-off-by: Shachar Sharon <ssharon@redhat.com>
(cherry picked from commit e05184d0a7)
What is Rook?
Rook is an open source cloud-native storage orchestrator for Kubernetes, providing the platform, framework, and support for Ceph storage to natively integrate with Kubernetes.
Ceph is a distributed storage system that provides file, block and object storage and is deployed in large scale production clusters.
Rook automates deployment and management of Ceph to provide self-managing, self-scaling, and self-healing storage services. The Rook operator does this by building on Kubernetes resources to deploy, configure, provision, scale, upgrade, and monitor Ceph.
The status of the Ceph storage provider is Stable. Features and improvements will be planned for many future versions. Upgrades between versions are provided to ensure backward compatibility between releases.
Rook is hosted by the Cloud Native Computing Foundation (CNCF) as a graduated level project. If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Rook plays a role, read the CNCF announcement.
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For installation, deployment, and administration, see our Documentation and QuickStart Guide.
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We welcome contributions. See Contributing to get started.
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If you find a vulnerability or a potential vulnerability in Rook please let us know immediately at cncf-rook-security@lists.cncf.io. We'll send a confirmation email to acknowledge your report, and we'll send an additional email when we've identified the issues positively or negatively.
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Official releases of Rook can be found on the releases page. Please note that it is strongly recommended that you use official releases of Rook, as unreleased versions from the master branch are subject to changes and incompatibilities that will not be supported in the official releases. Builds from the master branch can have functionality changed and even removed at any time without compatibility support and without prior notice.
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Rook is under the Apache 2.0 license.
